Revi is a young girl who was traveling home to earth with Dr. Ban when a group of brigands named the Seawolves attacked her transport, killing everyone else aboard. She had hoped to be reunited with her father, a former Solar Federation captain, upon her return to earth, but circumstances have forced her to remain aboard the Arcadia. Her father has been shanghaied into Illumidas servitude, but he ultimately calls off his attack upon the Arcadia in order not to place his daughter in jeopardy, withdrawing from the field of combat and entrusting her care to Harlock.

Revi is unaware of her father's new role as a reluctant Illumidas lackey, and believes he will return to see her at Christmastime, which, unknown to her, he does, just in time to save the Arcadia and his daughter from destruction.

(Source: cornponeflicks.org/harlock/pirates.html)